On thermoplasmonic properties of star-shaped gold dimer nanoframes

IF 3.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical and Quantum Electronics Pub Date : 2025-05-17 DOI:10.1007/s11082-025-08240-x

A. Azarian, S. Zamani

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引用次数: 0

Abstract

Star-shaped Gold Dimer Nanoframes (SGDNs) with five branches have demonstrated exceptional thermoplasmonic potential for cancer photothermal therapy, leveraging their unique plasmonic properties. This study focuses on the critical role of nanoframe width in modulating local electric fields and enhancing surface temperatures. The results indicate that increasing the width of SGDNs induces a blue shift in the first plasmon mode and decreases the absorption peak intensity. In contrast, the second mode shows an increase in electric field enhancement with width. Maximum hotspots (E/E₀)_max = 250 were observed in the central gap for the second mode, with associated temperature increases reaching ΔT_max ≈ 30 °C in skin-like environments, significantly higher than the first mode (ΔT_max = 12 °C). These temperature enhancements, particularly localized at inter-arm gaps, underline SGDNs' effectiveness in targeted thermal applications, selectively destroying tumor cells while preserving surrounding healthy tissues. The study provides clear evidence supporting SGDNs as highly efficient nanostructures for photothermal cancer treatment in VIS and NIR regions.

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星形金二聚体纳米框架的热等离子体性质

具有五个分支的星形金二聚体纳米框架（sgdn）利用其独特的等离子体特性，在癌症光热治疗中表现出了非凡的热等离子体潜力。研究了纳米框架宽度在调制局部电场和提高表面温度方面的关键作用。结果表明，增加sgdn的宽度会引起第一等离子体模式的蓝移，并降低吸收峰强度。相比之下，第二种模式显示出电场增强随宽度的增加而增加。在第二模式下，最大热点（E/E0）max = 250位于中心间隙，在类皮肤环境下，相关温度升高达到ΔTmax≈30°C，显著高于第一模式（ΔTmax = 12°C）。这些温度增强，特别是定位于臂间间隙，强调了sgdn在靶向热应用中的有效性，选择性地破坏肿瘤细胞，同时保留周围的健康组织。该研究提供了明确的证据，支持sgdn作为可见光和近红外区域光热癌症治疗的高效纳米结构。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optical and Quantum Electronics 工程技术-工程：电子与电气

CiteScore

4.60

自引率

20.00%

发文量

810

审稿时长

3.8 months

期刊介绍： Optical and Quantum Electronics provides an international forum for the publication of original research papers, tutorial reviews and letters in such fields as optical physics, optical engineering and optoelectronics. Special issues are published on topics of current interest. Optical and Quantum Electronics is published monthly. It is concerned with the technology and physics of optical systems, components and devices, i.e., with topics such as: optical fibres; semiconductor lasers and LEDs; light detection and imaging devices; nanophotonics; photonic integration and optoelectronic integrated circuits; silicon photonics; displays; optical communications from devices to systems; materials for photonics (e.g. semiconductors, glasses, graphene); the physics and simulation of optical devices and systems; nanotechnologies in photonics (including engineered nano-structures such as photonic crystals, sub-wavelength photonic structures, metamaterials, and plasmonics); advanced quantum and optoelectronic applications (e.g. quantum computing, memory and communications, quantum sensing and quantum dots); photonic sensors and bio-sensors; Terahertz phenomena; non-linear optics and ultrafast phenomena; green photonics.